You should get some medal augments and have some movement skills to avoid these situations.

EDIT: Why didn't you SS to a mob on the other side of the bridge? It's been ages since I played Nightblade, but I believe SS would let you pass through anything blocking your path.

Yes, SS allows you to do exactly that. Too bad that it was on cooldown because I just used it to get into a mob, though. I should have put one point in Blade Barrier but I think I wouldn't have reacted quickly enough anyway. So, yeeeeeah......